Markf98

Hi all, just looking to see if anyone can offer advice before I book my van in with a garage to look at. I've got power as all the dash lights, windows etc work but the van wont start. It makes no noise at all when trying to start it so not even trying to turn over. Have tried jump starting it but again nothing happens despite all the electrics working. The van is a 1998 HI-ACE. I appreciate there's probably all manner of things it could be but wondered if anyone had experienced similar. Cheers